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Structural / Purlin loads
Fontana feature: Table to dropdownConvert point loads
to equivalent
uniform loads.
Build a dropdown from a five-row loading table. Calculate bending-equivalent uniform loads from each case’s span, point load and selected arrangement.
“How do Zed and Cee purlins differ, and where can I find their loading guidance?”
01 / Search
Find Zed and Cee
purlin guidance.
Ask about the profiles shown in the image. Open the source citation to read the explanation and locate the loading-arrangement guidance.
The search explains the section types. The calculator then uses a related table of simple-span point-load arrangements from the same guide.
Search and calculation can use different parts of the same document.
Ask about the two profiles, then open a citation in the source guide.
02 / Table → calculation
Create a dropdown
from the loading table.
Add the five arrangements and their coefficients to a table. Use its rows as dropdown options and insert the selected coefficient into the load-conversion formula.
Enter the span and point load. Review the chosen coefficient, substituted formula, units and bending-equivalent uniform load.
Keep the source citation and loading diagram beside the formula.
Build the dropdown from the five-row table, select an arrangement and inspect its coefficient in the calculation and result.
03 / Batch
Run the calculation
for a purlin schedule.
Enter the span, point load and loading arrangement for each roof bay. Run the rows through the same calculation and compare the equivalent uniform loads.
Review the inputs and calculated load for each case, then export the schedule.
Each row uses the same formula with its own span, point load and arrangement.
Run several cases, review the results and export the schedule.
A loading-arrangement dropdown, a cited conversion formula and a schedule of bending-equivalent uniform loads.
Section context and simple-span load-conversion layouts.
The calculation is a bending-equivalent load conversion. It does not check purlin capacity, support reactions or deflection.
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